在Sql Server 2008中，如何对每个客户的发货进行编号

我有两张桌子：客户------->发货

例如，我想为每个客户提供一个唯一的发货编号

CustomerID      ShipmentID       ShipmnetNumber
    10              50                  1
    10              51                  2
    10              55                  3

    15              56                  1
    15              57                  2
    15              58                  3

    17              59                  1
    17              60                  2

等等

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如何在sql server 2008中执行此操作要通过查询获取编号，您可以执行此操作

select CustomerID,
       ShipmentID,
       row_number() over(partition by Shipment.CustomerID  
                         order by ShipmentID) as ShipmentNumber
from Shipment

;with S as
(
  select ShipmentNumber,
         row_number() over(partition by Shipment.CustomerID  
                           order by ShipmentID) as ShipNum
  from Shipment
)
update S
set ShipmentNumber = ShipNum

如果要使用ShipmentNumber（新添加的列）更新表，可以这样做

select CustomerID,
       ShipmentID,
       row_number() over(partition by Shipment.CustomerID  
                         order by ShipmentID) as ShipmentNumber
from Shipment

;with S as
(
  select ShipmentNumber,
         row_number() over(partition by Shipment.CustomerID  
                           order by ShipmentID) as ShipNum
  from Shipment
)
update S
set ShipmentNumber = ShipNum

---

您正在谈论存储此

ShipmentNumber

列吗？如果是这样的话，那么在SQLServer中就没有很好的方法来实现这一点。Inserts需要找出当前分区

Max

，并阻止对同一分区的其他并发插入，等等。即使使用（With语句）也不能这样做吗？？可以直接通过

选择
和
行号
来完成，但是
发货号
不会随着时间的推移而稳定。请解释一下你想在这里做什么（动机）好吧，我打算存储它，但是我怎么做呢？按照Mikael的回答，初始设置是直接的，但是保持它最新是一件痛苦的事。